Show tree the first sun dial to keep time with reasonable acau racy must have been one ot of the ear blest necessities ot of man hence the rema remarkable reable ingenuity ot of many primi live inventions for this purpose the utilization ot of shadows an idea which had its final development in the sun dial being probably the earliest as it w was as the most obvious the first sun dial must have been a tree which may be said to have stood at one end of the path of evolution in ing apparatus the modern chrono meter representing at the other end the final development of such con tri vances washington correspond corre spon dence deuce in st louis republic I 1 |